#pragma once
#include <cstdint>
#include <cstdlib>
#include<iostream>// IWYU pragma: keep
#include<unistd.h>
#include<functional>// IWYU pragma: keep
#include<sys/types.h>
#include<sys/wait.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<cstring>
#include<pthread.h> 
#include<utility>// IWYU pragma: keep
#include"Log.hpp"// IWYU pragma: keep
#include"InetAddr.hpp"// IWYU pragma: keep
#include"ThreadPool.hpp"// IWYU pragma: keep
using namespace log_ns;

enum{
    SOCKET_ERROR=1,
    BIND_ERROR,
    LISTEN_ERROR
};

const static int gport=8888;
const static int gsock=-1;
const static int gblcklog=8;

using task_t =std::function<void()>;

class TcpServer
{
public:
    TcpServer(uint16_t port=gport,int sockfd=gsock)
    :_port(port),
    _listensockfd(sockfd), 
    _isrunning(false)
    {

    }
    void InitServer()
    {
        //1.创建socket
        _listensockfd=::socket(AF_INET,SOCK_STREAM,0);
        if(_listensockfd<0)
        {
            exit(SOCKET_ERROR);
            LOG(FATAL,"socket create error\n");
        }
        LOG(INFO,"socket create success, sockfd:%d\n",_listensockfd);

        struct sockaddr_in local;
        memset(&local, 0, sizeof(local));
        local.sin_family=AF_INET;
        local.sin_port=htons(_port);
        local.sin_addr.s_addr=INADDR_ANY;

        //2.bind sockfd 和 Socket addr
        if(::bind(_listensockfd,(struct sockaddr*)&local,sizeof(local))<0)
        {
            LOG(FATAL,"bind error\n");
            exit(BIND_ERROR);
        }
        LOG(INFO,"bind success\n");

        //3.因为tcp是面向连接的，tcp需要未来不断地能够做到获取连接
        if(::listen(_listensockfd, gblcklog)<0)
        {
            LOG(FATAL,"listen error\n");
            exit(LISTEN_ERROR);
        }
        LOG(INFO,"listen success\n");

    }
    class ThreadDate
    {
    public:
        ThreadDate(int sockfd,TcpServer *self,const InetAddr &addr):_sockfd(sockfd),_self(self),_addr(addr)
        {}
    public:
        int _sockfd;
        TcpServer *_self;
        InetAddr _addr;
    };
    void Loop()
    {
        _isrunning=true;
        while(_isrunning)
        {
            struct sockaddr_in client;
            socklen_t len=sizeof(client);
            //sleep(1);
            //4.获取新连接
            int sockfd=::accept(_listensockfd,(struct sockaddr*)&client,&len);
            if(sockfd<0)
            {
                LOG(WARNING,"accept error\n");
                continue;
            }
            InetAddr addr(client);
            LOG(INFO,"get a new link, client info : %s, sockfd is : %d\n",addr.AddrStr().c_str(),sockfd);
            
            //version 0 ---不靠谱版本
            //Service(sockfd,addr);

            //version 1 ---多进程版本
            // pid_t id=fork();
            // if(id==0)
            // {
            //     //child
            //     ::close(_listensockfd);//建议
            //     if(fork()>0)exit(0);

            //     Service(sockfd,addr);
            //     exit(0);
            // }
            // //father
            // ::close(sockfd);
            // int n =waitpid(id,nullptr,0);
            // if(n>0)
            // {
            //     LOG(INFO,"wait child success\n");
            // }

            //version 2 --- 多线程版本 --- 不能关闭fd了，也不需要了
            // pthread_t tid;
            // ThreadDate *td=new ThreadDate(sockfd,this,addr);
            // pthread_create(&tid,nullptr,Execute,td);//新线程进行分离

            //version 3 --- 线程池版本 int sockfd,InetAddr addr
            task_t t=std::bind(&TcpServer::Service,this,sockfd,addr);
            ThreadPool<task_t>::GetInstance()->Equeue(t);
        }
        _isrunning=false;
    }

    static void *Execute(void *args)
    {
        pthread_detach(pthread_self());

        ThreadDate *td=static_cast<ThreadDate *>(args);

        td->_self->Service(td->_sockfd, td->_addr);
        delete td;
        return nullptr;
    }

    void Service(int sockfd,InetAddr addr)
    {
        //长服务
        while (true) 
        {
            char inbuffer[1024];//统一当作字符串
            ssize_t n=::read(sockfd,inbuffer,sizeof(inbuffer)-1);
            if(n>0)
            {
                inbuffer[n]=0;
                LOG(INFO,"get a message from client %s, message: %s",addr.AddrStr().c_str(),inbuffer);

                std::string echo_string = "[server echo]# ";
                echo_string+=inbuffer;
                write(sockfd,echo_string.c_str(),echo_string.size());

               
                // std::cout<<"Client Say: "<<inbuffer<<std::endl;
            }
            else if(n==0)
            {
                LOG(INFO,"client %s quit\n",addr.AddrStr().c_str());
                break;
            }
            else 
            {
                LOG(ERROR,"read error %s\n",addr.AddrStr().c_str());
                break;
            }
        }
        ::close(sockfd);
    }
    ~TcpServer()
    {

    }
private:
    uint16_t _port;
    int _listensockfd;
    bool _isrunning;
};